(function($) { 
$.fn.extend({ 
insertContent: function(myValue, t) { 
var $t = $(this)[0]; 
if (document.selection) { //ie 
this.focus(); 
var sel = document.selection.createRange(); 
sel.text = myValue; 
this.focus(); 
sel.moveStart('character', -l); 
var wee = sel.text.length; 
if (arguments.length == 2) { 
var l = $t.value.length; 
sel.moveEnd("character", wee + t); 
t <= 0 ? sel.moveStart("character", wee - 2 * t - myValue.length) : sel.moveStart("character", wee - t - myValue.length); 
sel.select(); 
} 
} else if ($t.selectionStart || $t.selectionStart == '0') { 
var startPos = $t.selectionStart; 
var endPos = $t.selectionEnd; 
var scrollTop = $t.scrollTop; 
$t.value = $t.value.substring(0, startPos) + myValue + $t.value.substring(endPos, $t.value.length); 
this.focus(); 
$t.selectionStart = startPos + myValue.length; 
$t.selectionEnd = startPos + myValue.length; 
$t.scrollTop = scrollTop; 
if (arguments.length == 2) { 
$t.setSelectionRange(startPos - t, $t.selectionEnd + t); 
this.focus(); 
} 
} 
else { 
this.value += myValue; 
this.focus(); 
} 
} 
}) 
})(jQuery); 